Set the start value of the ordered list to "5", when using roman numbers (type="I"):
document.getElementById("myOl").start = "5";
Click the button to set the start value of the ordered list to "5".
<!DOCTYPE html> <html> <body> <ol id="myOl" type="I"> <li>CSS</li> <li>HTML</li> <li>Java</li> </ol>//from w w w . j av a 2 s .c om <button onclick="myFunction()">Test</button> <script> function myFunction() { document.getElementById("myOl").start = "5"; } </script> </body> </html>